This circuit was obtained from documentation from 1968. The transistors used as well as the tunnel diodes are of the time.
We found this circuit in a 1978 publication. It is possible to detect the emission of infrared in remote...
This circuit with an optical path sensor was found in a 1995 documentation. The circuit fires...
The figure shows how to use an LM3914 with a variable range moving point. The circuit has an...